Fluorosilicone O-rings (FVMQ) are a hybrid of silicone and FKM (Viton) that combines the high and low temperature performance of silicone with the fuel and oil resistance of FKM. At Everest Rubber, we manufacture fluorosilicone O-rings and fluorosilicone seals with excellent jet fuel, ozone, sunlight and weathering resistance. Ideal for aerospace, aviation, fuel systems and semiconductor applications. ISO 9001 certified manufacturer with fast delivery across the USA.
Fluorosilicone O-Rings Rubber
The primary use of fluorosilicone is in fuel systems at temperatures up to 220°C and in applications where the dry-heat resistance of silicone is required but the material may be exposed to petroleum oils and/or hydrocarbon fuels. For Viton seals, see Viton rubber.
Our engineering department has developed the polymer with maximum ability to withstand low temperatures
in contact with oil preserving its sealing properties.
FLUOROSILICON BASED COMPOUND
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What is Fluorosilicone?
Fluorosilicone o-rings are a hybrid of silicone and FKM resulting in great jet fuel resistance with high and low temperature performance. Also widely used in semiconductor Ashing equipment with strong resistance to oxygen plasma, FVMQ fluorosilicone o-rings also feature excellent flexibility, compression resistance, aging and sunlight resistance, and overall wide range of basic chemical resistance.
Fluorosilicone elastomer seals also offer an outstanding resistance to ozone, sunlight and weathering, which makes it the perfect compound to use within aviation. Although generally specified for aerospace use, fluorosilicone is also becoming an increasingly popular material for a wider range of sealing purposes. For high-temperature silicone seals, see silicone for high temperatures.
For more than 50 years, Everest Rubber has been offering custom and standard o-rings and other sealing solutions for multiple industries. With millions of products produced and shipped annually, we are the experts your organization needs to seal the success of your application.
Physical Properties: Fluorosilicone O-Rings Rubber
| PARAMETERS | SPECIFICATIONS |
|---|---|
| Hardness, Shore A | 65 |
| Tensile Strength, PSI | 1500 Minimum |
| Maximum Elongation | 330 % |
| Tear Strength, N/Mm | 24.5 Minimum |
| Operating Temperature Range | -63°C to 220°C |
Mechanical and Operational Properties
| SUBSTANCES | SPECIFICATIONS |
|---|---|
| Aged In Air At 175°C | |
| Change In Hardness | +2 Points |
| Maximum Elongation | 330 % |
| Tear Strength, N/Mm | 24.5 Minimum |
| Operating Temperature Range | -63°C to 220°C |
Chemical Properties
| SUBSTANCES | SPECIFICATIONS |
|---|---|
| Immersion In Transformer Oil 70 Hrs At 100°C | |
| Change In Hardness | -1 Points |
| Volume Change | +0.65% |
| Change In Tensile Strength | -4.8% |
| Change In Elongation | -5% |
| Permanent Compression 22 Hrs At 100°C (ASTM 395) | |
| Permanent Compression 70 Hrs At 100°C | 6.35% |
Fluorosilicone O-Ring Temperature Range:
The above temperature ranges are for dry air service only and should not be used to determine design specifications or end-use temperature limits. The actual temperature range of a joint in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and temperature cycling effects, and other factors. The most practical way to determine the end-use temperature range is to test under actual use conditions.
Features and Durability of Fluorosilicone O-Rings:
- Excellent flexibility and resistance to compression set
- Excellent aging and weather resistance
- Resistance to oxidative chemicals, animal and vegetable oils, fuels, aromatic and chlorinated solvents
- Resistant to dilute alkalis, diester oils, aliphatic and aromatic fluorocarbons, silicone oils, toluene, benzene, ozone and oxidizing environments.
Fluorosilicone O-Rings Limitations:
- - Brake fluids, ketones, hydrazine, aldehydes, amines, ketones
- - Poor abrasion resistance
Frequently Asked Questions about Fluorosilicone O-Rings
What is fluorosilicone rubber?
Fluorosilicone (FVMQ) is a hybrid of silicone and FKM (Viton), combining the high and low temperature performance of silicone with the fuel and oil resistance of FKM. It is widely used in aerospace, aviation and fuel systems.
What is the temperature range of fluorosilicone O-rings?
Fluorosilicone O-rings have an operating temperature range of -63°C to 220°C (-81°F to 428°F). This makes them ideal for extreme temperature applications, especially in aerospace and aviation.
What are fluorosilicone O-rings used for?
Fluorosilicone O-rings are used in fuel systems, jet engines, aerospace sealing applications, semiconductor ashing equipment, and any application requiring resistance to jet fuel, petroleum oils, hydrocarbon fuels, ozone, sunlight and weathering. For standard Viton seals, see Viton rubber.
What are the limitations of fluorosilicone O-rings?
Fluorosilicone O-rings are not recommended for brake fluids, ketones, hydrazine, aldehydes, amines, or applications requiring high abrasion resistance. For these applications, consider other elastomers such as FKM (Viton) or HNBR.
